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Finding the Fourth Proportional to 861,228.72, 1,188,487.08 and 479,248.92

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Solution

The fourth proportional to 861,228.72, 1,188,487.08 and 479,248.92 is: 661,358.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,228.72 : 1,188,487.08 = 479,248.92 : x
  2. Step 2: Convert to fraction form
    861,228.72/1,188,487.08 = 479,248.92/x
  3. Step 3: Cross multiply
    861,228.72x = 1,188,487.08 × 479,248.92
  4. Step 4: Simplify right side
    861,228.72x = 569,581,149,523.95
  5. Step 5: Solve for x
    x = 569,581,149,523.95/861,228.72
  6. Step 6: Final answer
    x = 661,358.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.